Movie about bufferly fairy
I like a movie about bufferly fairy, but I watched it when I was a child, so I can not remember its name. I just remember that, a little boy found a pupa. The pupa is not a nomal bufferly, it was a bufferly fairy. The boy become friend with the bufferly fairy. When the moon is full, the bufferly will go away. The boy does not want to let the bufferly fairy go, so he always locks the window when the moon is full. But one day, the boy forget to lock the window, so the bufferly fairy went away follow the calling of the fullmoon.